Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4b95541c3adde0a…

MALICIOUS

PDF

34.8 KB Created: 2021-06-27 04:36:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: abcff208171a78aaa68e18ec66e62249 SHA-1: adbe34669d84ee332792bf5c7a1d6b5ef0f7ce8c SHA-256: d4b95541c3adde0a7f8271b939bd6040a8629ccd5dc682826bd09b193661eeb9
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a known malicious redirector infrastructure, specifically http://netcdn.co/app/431946152/top-10-free-items-in-roblox-game-hack. The document body and heuristics indicate a lure for free game items, likely a phishing or scam attempt. No scripts were extracted, but the presence of malicious links and the ML classifier's high confidence suggest a high likelihood of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://netcdn.co/app/431946152/top-10-free-items-in-roblox-game-hack In PDF document text
    • http://www.amtqatar.com/uploaded_files/userfiles/files/roblox-how-to-report-a-hacker_GM431946152.pdfIn PDF document text
    • http://www.amtqatar.com/uploaded_files/userfiles/files/free-tiktok-followers-no-human-verification_GM835599320.pdfIn PDF document text
    • http://www.amtqatar.com/uploaded_files/userfiles/files/free-coin-master-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://www.amtqatar.com/uploaded_files/userfiles/files/how-to-get-free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.amtqatar.com/uploaded_files/userfiles/files/games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://www.amtqatar.com/uploaded_files/userfiles/files/haw-to-get-free-stuff-roblox-march-2021_GM431946152.pdfIn PDF document text
    • http://www.amtqatar.com/uploaded_files/userfiles/files/free-robux-hack_GM431946152.pdfIn PDF document text
    • http://www.amtqatar.com/uploaded_files/userfiles/files/roblox-items-for-free_GM431946152.pdfIn PDF document text
    • http://www.amtqatar.com/uploaded_files/userfiles/files/buy-robux-free_GM431946152.pdfIn PDF document text
    • http://www.amtqatar.com/uploaded_files/userfiles/files/how-to-get-free-robux-items-with-this-admin-code_GM431946152.pdfIn PDF document text
    • http://www.amtqatar.com/uploaded_files/userfiles/files/pubg-uc-vietnam_GM1330123889.pdfIn PDF document text
    • http://www.amtqatar.com/uploaded_files/userfiles/files/roblox-hack-ga_GM431946152.pdfIn PDF document text
    • http://www.amtqatar.com/uploaded_files/userfiles/files/free-minecraft-skins-java_GM479516143.pdfIn PDF document text
    • http://www.amtqatar.com/uploaded_files/userfiles/files/coin-master-hack-mod-apk-unlimited-spin-download_GM406889139.pdfIn PDF document text
    • http://www.amtqatar.com/uploaded_files/userfiles/files/free-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://www.amtqatar.com/uploaded_files/userfiles/files/rbx-free-robux_GM431946152.pdfIn PDF document text
    • http://www.amtqatar.com/uploaded_files/userfiles/files/free-minecraft-accounts-2021_GM479516143.pdfIn PDF document text
    • http://www.amtqatar.com/uploaded_files/userfiles/files/free-robux-eu5-net_GM431946152.pdfIn PDF document text
    • http://www.amtqatar.com/uploaded_files/userfiles/files/free-tiktok-followers-2021_GM835599320.pdfIn PDF document text
    • http://www.amtqatar.com/uploaded_files/userfiles/files/tap-for-free-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000315c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x315C 22084 bytes
SHA-256: 7294698edcaaf6fca8e3d3a9cc7766df355f4426571d6bc0356817bdc418fde2
font_01_sfnt_off000061b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61B7 19468 bytes
SHA-256: ee4fc854fd481c627f7faf2186a0f353a988effa6816512e63d33ad722d5a585

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